английский, 9 класс, с пояснением, пожалуйста

Mum: Bob, I have 18 ________ now. 19 ________ be OK?
Bob: Yes, Mum! Don’t worry 20 ________ me. I’ll be fine. Is Dad going to 21________
you to the station?
Mum: No, he can’t. I’m 22 ________ take a taxi. If you go to the shopping
23________, take an umbrella with you. It’s really 24________ today – it might rain
later. And don’t 25 ________ all you money on CDs, Bob!
Bob: OK, Mum!
Задание 18
a) leave b) to leave с) left
Задание 19
a) Will you b) Are you c) Are you going
Задание 20
a) for b) of c) about
Задание 21
a) bring b) go c) take
Задание 22
a) will b) going to c) have to
Задание 23
a) shop b) mall c) store
Задание 24
a) cloudy b) rainy c) foggy
Задание 25
a) give b) pay c) spend